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When a worn or undersized sprocket causes chain skipping, premature wear, or unexpected downtime, finding an exact-match replacement becomes urgent. Makers, machine builders, and repair technicians working with 10A (ANSI #50) roller chain systems need a flat sprocket that holds tight tolerances and drops straight into existing drive assemblies without modification.
These 10A chain drive flat sprockets are machined from carbon steel with a natural or lightly finished surface. They are designed for roller chain with a pitch of 15.875mm (5/8 inch). Tooth counts range from 10T to 60T, covering bore diameters that typically span 10–50mm (0.39–1.97 in) depending on the selected tooth count. Hub thickness and overall plate dimensions vary by model — see variant options for exact measurements.
Typical applications include go-kart and mini-bike final drives, conveyor and feeder drive systems, agricultural equipment chain drives, and light industrial power transmission assemblies where a compact flat sprocket profile is required.
| Chain Standard | ANSI #50 / ISO 10A |
|---|---|
| Chain Pitch | 15.875mm (5/8 in) |
| Tooth Count Range | 10T – 60T (see variant options) |
| Material | Carbon Steel |
| Sprocket Type | Flat / Plate Sprocket |
| Bore Diameter | See variant options |
| Hub Thickness | See variant options |
| Outside Diameter | See variant options |
| Surface Finish | See variant options |
| Quantity per Order | 1 piece |
The tooth count determines your drive ratio. Divide the driven sprocket teeth by the drive sprocket teeth to get the reduction ratio. For example, a 10T drive sprocket paired with a 30T driven sprocket gives a 3:1 reduction. Match the tooth count to your required output speed and torque, and ensure both sprockets share the same 15.875mm (10A) chain pitch.
These sprockets are designed for ANSI #50 / ISO 10A roller chain with a pitch of 15.875mm (5/8 inch). Do not use with #40 (12.7mm pitch) or #60 (19.05mm pitch) chain — the tooth geometry will not match and the chain will not seat correctly.
These are carbon steel sprockets with a standard finish. They are suitable for dry or lightly lubricated indoor environments. For outdoor or high-moisture applications, we recommend applying a chain lubricant regularly or considering a sprocket with a zinc or black oxide coating. Contact us to confirm finish options for specific variants.
Yes, provided the replacement sprocket matches the original in chain pitch (15.875mm / 10A), tooth count, and bore diameter. Always measure your existing sprocket's bore and hub dimensions before ordering. If the bore is too small, a machinist can enlarge it — but it cannot be reduced.
Bore diameter varies by tooth count and is listed in the variant details. If you cannot find the specification for your selected tooth count, use the Contact Us form to request the exact bore and hub dimensions before placing your order. We do not recommend ordering without confirming bore compatibility with your shaft diameter.
Common applications include go-kart and mini-bike final drives, conveyor belt drive systems, agricultural machinery chain drives, small engine power transmission, and general light-to-medium industrial drive assemblies. The flat plate profile is particularly useful where axial space is limited and a hub-style sprocket would not fit.
Each order includes one (1) sprocket of the tooth count selected from the variant options. If you need a matched drive and driven pair, add two separate line items with the appropriate tooth counts.
